1.7 One of these is not a wind instrument.
(2)
a. clarinets
b. trumpets
c. drums d. flutes
1.8 A beam of polarized light is one constrained to vibrate in a ............plane
perpendicular to the beam.
(2)
a. multiple b. triple c. single d. quadruplet
1.9 Sound wave below 20 Hz is called what?
{2)
a. ultrasonic wave b. audible wave c. infrasonic wave d. critical wave
Questions 1.10 and 1.11 are based on the statement below:
The amplitude modulation {AM)radio band extends from 5.4 x 10 5 Hz to
1.7 x 10 6 Hz. If the speed of light is 3 x10 8 m/s;
1.10 What is the longest wavelength in meters?
(2)
a. 1.8 x 10 2 m b. 5.6 x 10 2 m c. 6.5 x 10 3m d. 0.9 x 10 3m
1.11 Determine the shortest wavelength.
(2)
a. 1.8 x 10 2 m
b. 5.6 x 10 2 m
C. 6.5 X 10 3 m
d. 0.9 x 10 3 m
1.12 Light reflecting off a flat mirror creates an image that appears to be ...........
the mirror.
(2)
a. infront
b. behind
c. lateral d. tangential
1.13 ........... image cannot be projected on a screen.
(2)
a. real
b. virtual
c. critical
d. principal
1.14 A light ray of wavelength 589 nm traveling through air strikes a smooth, flat
slab of crown glass at an angle of 30° to the normal. Determine the angle of
refraction.
{2)
a. 18.2° b. 20.1° C. 17.2°
d.19.2°
1.15 A type of aberration in which the wavelength is dependent on refraction is
called what?
(2)
3